"The Royal Spanish Football Federation wants to show its total backing for the Spanish international footballer, Marc Bartra, after he was injured as a result of some explosions that affected the bus of his club, Borussia Dortmund," the governing body said in a statement.

"The RFEF wishes him a quick recovery and condemns any type of violence."

Goalkeeper Roman Burki was alongside Bartra when the attack happened and he told Blick of how Dortmund's players ducked for cover following the first blast.

"I was sitting in the back row next to Marc Bartra, who was hit by fragments of the broken window," Burki said.